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| author | Will Deacon | 2018-03-13 21:45:45 +0100 |
|---|---|---|
| committer | Will Deacon | 2018-07-05 11:05:06 +0200 |
| commit | c11090474d70590170cf5fa6afe85864ab494b37 (patch) | |
| tree | 7bb33c5eee9bdcb1f8d84480b915a21db56eac14 /arch/arm64/Kconfig | |
| parent | arm64: barrier: Implement smp_cond_load_relaxed (diff) | |
| download | kernel-qcow2-linux-c11090474d70590170cf5fa6afe85864ab494b37.tar.gz kernel-qcow2-linux-c11090474d70590170cf5fa6afe85864ab494b37.tar.xz kernel-qcow2-linux-c11090474d70590170cf5fa6afe85864ab494b37.zip | |
arm64: locking: Replace ticket lock implementation with qspinlock
It's fair to say that our ticket lock has served us well over time, but
it's time to bite the bullet and start using the generic qspinlock code
so we can make use of explicit MCS queuing and potentially better PV
performance in future.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/Kconfig')
| -rw-r--r-- | arch/arm64/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 42c090cf0292..facd19625563 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -44,6 +44,7 @@ config ARM64 select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE if !PREEMPT select ARCH_USE_CMPXCHG_LOCKREF select ARCH_USE_QUEUED_RWLOCKS + select ARCH_USE_QUEUED_SPINLOCKS select ARCH_SUPPORTS_MEMORY_FAILURE select ARCH_SUPPORTS_ATOMIC_RMW select ARCH_SUPPORTS_INT128 if GCC_VERSION >= 50000 || CC_IS_CLANG |